Chuck



S. E. HORTON Jan. 1, 1924 CHUCK Filed July 5 1920 .[wveniom idzw LIJEHOPZZ'FQ Y) It i) Patented Jan. l, 1924.

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SIDNEY E. HORTON, OF WINDSOR LOCKS, CONNECTICUT, ASSIGNOB TO THE E. HORTON SON COMPANY, OF WINDSOR LOCKS, CONNECTICUT, A CORPORATION OF CON- CHUCK.

Application filed July 3,

To all whom it may concern:

Be it known that I, SIDNEY E. Hon'ron, acitizen of the United States, and a res1-' dent of lVindsor Locks, in the county of Hartford, State of Connecticut, have invented a new and useful Improvement in Chucks, of which the following description, in connection with the, accompanying drawings, is a. specification, like characters on the drawings representing like parts.

This invention pertains to improvements in chucks. It is among the objects of the invention to provide a chuck of simple construction, which is at the same time efficient in operation.

In the drawings, which show a preferred form of one embodiment of my invention Figure 1 is a front elevation of a chuck;

Fig. 2 is a section on the line 22 of Fig. 1; and

Fig. 3 shows a detail of preferred mechanism used in changing the chuck from internal chucking to external chucking and vice versa.

Referring to the drawings and to the preferred form of my invention selected for illustrative purposes, I have shown a chuck including a body 5 carrying jaws 6 adapted to grip the workand adapted to be moved in work-gripping direction by resilient means typified by the spring 7. The sgrin 7 may be connected at one end 8 to the chuck body and at the other end 9 to a part adapted to oscillate relative to the chuck body, such oscillatory part being herein typified by the oscillatory member 10, which is preterably located at the periphery of the chuck and which preferably carries an internal gear 12, which, therefore, also oscillates and is the effective element of said oscillatory part. Meshing with the internal gear 12, Ipreferably provide, as shown, a plurality of pinions 13 which may be journalled in disks or spiders 1d, 15, secured to the chuck body. The spring 7 constantly tends to 1'0- tate the ring 10 and parts connected therewith relative to the chuck body, such rota tion or partial. rotation bein in the direction of the arrow shown in Fig. 1. The internal gear 12, being secured to the ring 10, is moved therewith and imparts rotation to the pinions 13. The pinions 13 carryc-ranks or eccentric members 15, which impart work-grlpplng movement to the aws 1826. Serial No. 393,988.

6 through any suitable mechanism typified by the links 16 having pivotal connections 17 with the slide jaws 18 of the chuck. The slide jaws 18, which carry the work-gripping jaws 6, are heldin guided relation to the chuck body in any usual or suitable man It will be clear from the foregoing description that, when the internal gear 12 moves in the direction of the arrow shown in Fig. 1, the pinions 13 meshing therewit will be turned in a contra-clockwise direction, thereby moving the eccentric pivots 15- toward the axis of the chuck and, through the links 16, moving the pivots'17 toward the axis of the chuck, thereby actuating the j awsin work-gripping direction. The parts as shown in Fig. 1 are assembled for external chucking. When it is desired to adapt the chuck to'internal chucking, the internal gear 12 may be turned relative to the ring 10 suflicient distance to turn the pinions 13 through one hundred and eighty degrees of movement. After this adjustment of the internal gear 12 and ring 10, these parts are secured together in their new relationship and relative movement of the ring 10 and rack 12-actuated by the spring 7 wlllnow tend to move the pinions in a contra-clockwise direction but through a field o1": movement which will draw the pivot 15 and hence the pivot 17 and jaws connected thereto in a direction awayv from theaxis of the chuck. The. amount of spring-actuated movement between the chuck body and the ring 10 and connectedparts may be limited by any suitable stop mechanism typified by the lug 20 secured to the chuck body andthe lug 21 secured to the ring 10. The spring 7 may be of any suitable kind, but I prefer a spring of the leaf type, which tends either to straighten by reaction as shown, or, if desired, to become more greatly flexed by reaction. 7' The opening of the chuck jaws may be effected by any suitable mechanism acting against the resiliency of the spring 7, but I prefer to open the jaws by oscillatory movement of the ring 10 relative to the chuck body, such oscillatory movement being in a direction relative to the chuck body opposite to that indicated by the arrow in Fig. 1. I have indicated in the drawing, brake mechanism 22 the application of which, assuming the chuck body to be r0- Elli .sired to adjust the tating with the head stock of the lathe in the direction indicated by thearrow in 1, will retard the ring 10, thereby producing a limited amount of rotation of the ring -relative-to-the chuck body in a direction opposite to that indicated by the arrow in Fig. 1. It is obvious that this relative movement will rotate the pinions 13 and retract the jaws from the work, whether the chuck be acjusted for internal chucking or for external chucking.

A preferred form of connection between .the ring 10 and internalgear 12 is diagrammatically shown in .Fig. 3. When the screw is in the position indicated in Fig. .3, the internal gear is in pro er position for external chucking. lVhen it is'dechuck for internal chucking, .th screw SOisturned ninety degrees so that the narrow portion oi? the shank will :fit in the slot .31 .and then the screw, -Wltl1tl16I1IlQ, gear attached, ismoved thelength otthe slot 31 and -111t 0: tl18 aper- .ture 32 where the ow is again turned nninety degrees.

involving omission, substitution, alteration and :reversal of parts,.and even changes in the mode of operation, maybemade without departing from the scope of my invention, which is best defined in the following claims.

iclaimsz 1. A chuck comprising, in combination, a body, .a plurality of jaws, .an oscillatory part, spring .means urging said oscillatory part in one direction relative to the chuck bodr brake means ermitim n'iovement of 1 b a 0 said oscillatory part in tne opposite direc- .tion relative tothe chuck body,.and changeable connections operatively interposed betweensaid oscillatory part and saidspring, said connections permitting oscillation of saidoscillatory part in spring-actuateddisection to actuate sail jaws toward the axis oi"- the chuck for external chucking, or from the axis ofthe chuck forinternalchucking.

2. A chuck comprising, in combination, body, jaws, a plurality ofpinions one con-- eccentric means between said pinions and jaws, internal gear ,means ,meshing with said pinions and ,ineans providing for oscillating said internal gear through one field of oscillationtoactuate work-gripping and work-releasing movement of said ,jaws for external chucking and for oscillating said internal gear through another held of =oscillation to actuate -.\vorkgripping and work-releasing movement of said jaws for internal chucking.

4:. A chuck comprising, incombination, a body, a plurality of jaws, -a plurality 0f pinions, one connected to each of said ,javvs, eccentric means between said pinicns' and jaws, internal gear means :meshing with said pinions, rmeans providing for oscillating said internal gear throughone field oi": oscillation to actuate work-g ippi D and work-releasing movement of said jaws for external chucking and for 0sci,. ating-said internal gear through another field of oscillation to actuate work-g nu id work-releasing movement of "avs for internal chucking, .and spring means for actuating oscillation of said gear in workgripping directions for both internal and external chucking.

5,. A chuck comprising, in (combination, a body, a plurality of ;j" .-\\S,:2i-:plt11, jtyoi? .pinions, one connected to-each-of said aws,

eccentric means between said pinions and jaws, gear means meshing with said pin- .ions and (means providing for OSQllltiBlDg :said ,gear through one .field of oscillation to actuate Work-gripping and work-releasing movement of said jaws for external-chucking and {for oscillating said gear through .another-iicldi oi'i oscillation to actuate work- .gripping and wonlreleasing .movement of said jaws for internal-chucking. I

In testimony whereofil have signed my name to this specification. 

